公开(公告)号：US20140314140A1

公开(公告)日：2014-10-23

申请号：US14254400

申请日：2014-04-16

Applicant: QUALCOMM Incorporated

Inventor： Krishnakanth Rapaka ,  Ye-Kui Wang ,  Jianle Chen ,  Marta Karczewicz

IPC: H04N19/13 ,  H04N19/136 ,  H04N19/34 ,  H04N19/187

CPC classification number: H04N19/187 ,  H04N19/13 ,  H04N19/172 ,  H04N19/188 ,  H04N19/30 ,  H04N19/44 ,  H04N19/70

Abstract: In one example, the disclosure is directed to techniques that include receiving a bitstream comprising at least a syntax element, a first network abstraction layer unit type, and a coded access unit comprising a plurality of pictures. The techniques further include determining a value of the syntax element which indicates whether the access unit was coded using cross-layer alignment. The techniques further include determining the first network abstraction layer unit type for a picture in the access unit and determining whether the first network abstraction layer unit type equals a value in a range of type values. The techniques further include setting a network abstraction layer unit type for all other pictures in the coded access unit to equal the value of the first network abstraction layer unit type if the first network abstraction layer unit type is equal to a value in the range of type values.

Abstract translation: 在一个示例中，本公开涉及包括接收包括至少语法元素，第一网络抽象层单元类型和包括多个图片的编码访问单元的比特流的技术。 这些技术还包括确定语法元素的值，该值指示访问单元是否使用跨层对齐进行编码。 这些技术还包括确定访问单元中的图片的第一网络抽象层单元类型，并确定第一网络抽象层单元类型是否等于类型值范围内的值。 所述技术还包括：如果第一网络抽象层单元类型等于类型范围内的值，则将经编码的访问单元中的所有其他图像的网络抽象层单元类型设置为等于第一网络抽象层单元类型的值 价值观。

公开(公告)号：US20140254668A1

公开(公告)日：2014-09-11

申请号：US14196508

申请日：2014-03-04

Applicant: QUALCOMM Incorporated

Inventor： Krishnakanth Rapaka ,  Xiang Li ,  Jianle Chen ,  Ye-Kui Wang ,  Wei Pu

IPC: H04N19/503

CPC classification number: H04N19/17 ,  H04N19/33 ,  H04N19/436 ,  H04N19/50 ,  H04N19/503 ,  H04N19/70 ,  H04N19/80 ,  H04N19/82

Abstract: In one example, a device for coding video data includes a video coder configured to code a value for a syntax element representative of whether any two reference layer samples, collocated with two respective enhancement layer picture samples within a common enhancement layer tile, must be within a common reference layer tile, and code the enhancement layer picture samples based at least in part on the value of the syntax element.

Abstract translation: 在一个示例中，用于对视频数据进行编码的设备包括视频编码器，该视频编码器被配置为对语法元素的值进行编码，该语法元素表示是否在公共增强层瓦片内与两个相应的增强层图像样本并置的任何两个参考层样本必须在 公共参考层块，并且至少部分地基于语法元素的值来对增强层图像样本进行编码。

公开(公告)号：US10327002B2

公开(公告)日：2019-06-18

申请号：US14743253

申请日：2015-06-18

Applicant: QUALCOMM Incorporated

Inventor： Chao Pang ,  Krishnakanth Rapaka ,  Xiang Li ,  Joel Sole Rojals ,  Cheng-Teh Hsieh ,  Marta Karczewicz

IPC: H04N19/513 ,  H04N19/52 ,  H04N19/176 ,  H04N19/184 ,  H04N19/174 ,  H04N19/503 ,  H04N19/172 ,  H04N19/105 ,  H04N19/159 ,  H04N19/593 ,  H04N19/109

Abstract: Techniques and systems are provided for encoding and decoding video data. For example, a method of encoding video data including a plurality of pictures is described. The method includes performing intra-picture prediction on a block of one of the pictures to generate a prediction unit. Performing the intra-picture prediction includes selecting a reference block for intra-block copy prediction of a coding tree unit (CTU). The reference block is selected from a plurality of encoded blocks, and blocks within the CTU encoded with bi-prediction are excluded from selection as the reference block. Performing the intra-picture prediction further includes performing intra-block copy prediction with the selected reference block to generate the prediction unit. The method also includes generating syntax elements encoding the prediction unit based on the performed intra-picture prediction.

公开(公告)号：US10327001B2

公开(公告)日：2019-06-18

申请号：US14743176

申请日：2015-06-18

Applicant: QUALCOMM Incorporated

Inventor： Chao Pang ,  Krishnakanth Rapaka ,  Xiang Li ,  Joel Sole Rojals ,  Cheng-Teh Hsieh ,  Marta Karczewicz

IPC: H04N19/513 ,  H04N19/184 ,  H04N19/172 ,  H04N19/503 ,  H04N19/52 ,  H04N19/176 ,  H04N19/174 ,  H04N19/105 ,  H04N19/159 ,  H04N19/593 ,  H04N19/109

Abstract: Techniques and systems are provided for encoding and decoding video data. For example, a method of encoding video data includes obtaining video data at an encoder, and determining to perform intra-picture prediction on the video data, using intra-block copy prediction, to generate the plurality of encoded video pictures. The method also includes performing the intra-picture prediction on the video data using the intra-block copy prediction, and, in response to determining to perform the intra-picture prediction on the video data using the intra-block copy prediction, disabling at least one of inter-picture bi-prediction or inter-picture uni-prediction for the plurality of encoded video pictures. The method also includes generating the plurality of encoded video pictures based on the received video data according to the performed intra-block copy prediction.

公开(公告)号：US10212445B2

公开(公告)日：2019-02-19

申请号：US14878825

申请日：2015-10-08

Applicant: QUALCOMM Incorporated

Inventor： Krishnakanth Rapaka ,  Chao Pang ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/50 ,  H04N19/44 ,  H04N19/593 ,  H04N19/11 ,  H04N19/157 ,  H04N19/174 ,  H04N19/436 ,  H04N19/55

Abstract: According to techniques of this disclosure, a video decoder can be configured to, for one or more blocks coded with wavefront parallel processing enabled, determine a coding tree block (CTB) delay, wherein the CTB delay identifies a delay between when a first row of CTBs starts being decoded and when a second row of CTBs below the first row of CTBs starts being decoded; for a current block of video data coded in an intra-block copy (IBC) mode and coded with wavefront parallel processing disabled, determine an IBC prediction region for the current block within a picture that includes the current block based on the CTB delay that was determined for the one or more blocks coded with wavefront parallel processing enabled; identify, from within the determined IBC prediction region for the current block, a predictive block for the current block; and IBC decode the current block based on the predictive block.

公开(公告)号：US10212434B2

公开(公告)日：2019-02-19

申请号：US15009650

申请日：2016-01-28

Applicant: QUALCOMM Incorporated

Inventor： Krishnakanth Rapaka ,  Rajan Laxman Joshi ,  Vadim Seregin ,  Marta Karczewicz

IPC: H04N19/186 ,  H04N19/70 ,  H04N19/593 ,  H04N19/11 ,  H04N19/182 ,  H04N19/103 ,  H04N19/13 ,  H04N19/132 ,  H04N19/44 ,  H04N19/52 ,  H04N19/91

Abstract: A device for coding video data includes a memory storing video data and a video coder including one or more processors configured to determine a current coding unit of the video data is coded in a palette mode; determine a palette for the coding unit by, for a first entry of the palette, choosing a predictor sample from a reconstructed neighboring block of the coding unit and coding a difference between one or more color values of the first entry and one or more color values of the predictor sample.

公开(公告)号：US09979975B2

公开(公告)日：2018-05-22

申请号：US15465271

申请日：2017-03-21

Applicant: QUALCOMM Incorporated

Inventor： Krishnakanth Rapaka ,  Ye-Kui Wang ,  Adarsh Krishnan Ramasubramonian ,  Jianle Chen

IPC: H04B1/66 ,  H04N19/36 ,  H04N19/70 ,  H04N19/105 ,  H04N19/184 ,  H04N19/172 ,  H04N19/96 ,  H04N19/176

CPC classification number: H04N19/36 ,  H04N19/105 ,  H04N19/172 ,  H04N19/176 ,  H04N19/184 ,  H04N19/30 ,  H04N19/436 ,  H04N19/597 ,  H04N19/70 ,  H04N19/96

Abstract: Bitstream restrictions or constraints on the partitioning of pictures across layers of video data are described. In some examples, the number of tiles per picture for each layer of a plurality of layers is constrained based on a maximum number of tiles per picture for the layer. In some examples, the number of tiles per picture for each layer of the plurality of layers is no greater than the maximum number of tiles per picture for the layer. In some examples, a sum of the numbers of tiles per picture for the plurality of layers is no greater than a sum of the maximum numbers of tiles per picture for the plurality of layers. In some examples, a second largest coding unit (LCU) or coding tree block (CTB) size for a second layer is constrained based on, e.g., to be equal to, a first LCU size for a first layer.

公开(公告)号：US09883184B2

公开(公告)日：2018-01-30

申请号：US14876574

申请日：2015-10-06

Applicant: QUALCOMM Incorporated

Inventor： Krishnakanth Rapaka ,  Li Zhang ,  Rajan Laxman Joshi ,  Marta Karczewicz

IPC: H04N7/12 ,  H04N19/124 ,  H04N19/186 ,  H04N19/44 ,  H04N19/18 ,  H04N19/176 ,  H04N19/60 ,  H04N19/12

CPC classification number: H04N19/124 ,  H04N19/12 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/44 ,  H04N19/60 ,  H05K999/99

Abstract: A device for decoding video data is configured to determine for one or more blocks of the video data that adaptive color transform is enabled; determine a quantization parameter for the one or more blocks; in response to a value of the quantization parameter being below a threshold, modify the quantization parameter to determine a modified quantization parameter; and dequantize transform coefficients based on the modified quantization parameter.

公开(公告)号：US09843801B2

公开(公告)日：2017-12-12

申请号：US13933588

申请日：2013-07-02

Applicant: QUALCOMM Incorporated

Inventor： Xiang Li ,  Krishnakanth Rapaka ,  Liwei Guo ,  Jianle Chen ,  Marta Karczewicz

IPC: H04N11/04 ,  H04N7/12 ,  H04N11/02 ,  H04B1/66 ,  H04N19/51 ,  H04N13/00 ,  H04N19/597 ,  H04N19/105 ,  H04N19/187 ,  H04N19/33

CPC classification number: H04N13/161 ,  H04N19/105 ,  H04N19/187 ,  H04N19/33 ,  H04N19/597

Abstract: An apparatus for coding video information according to certain aspects includes a memory unit and a processor in communication with the memory unit. The memory unit stores video information of a reference layer. The processor determines a value of a video unit based at least in part on a prediction value and an adjusted residual prediction value associated with the reference layer. The adjusted residual prediction value is equal to a residual prediction from the reference layer multiplied by a weighting factor that is different from 1.

公开(公告)号：US20170302951A1

公开(公告)日：2017-10-19

申请号：US15484879

申请日：2017-04-11

Applicant: QUALCOMM Incorporated

Inventor： Rajan Laxman Joshi ,  Vadim Seregin ,  Ye-Kui Wang ,  Krishnakanth Rapaka ,  Marta Karczewicz

IPC: H04N19/513 ,  H04N19/46 ,  H04N19/105 ,  H04N19/159 ,  H04N19/70 ,  H04N19/174 ,  H04N19/172 ,  H04N19/184

Abstract: A method of encoding video data comprising encoding a current picture of video data, generating a respective collocated reference picture index syntax element for one or more slices of the current picture, and performing a bitstream conformance check only for slices of the one or more slices that do not have an intra slice type and for which a temporal motion vector predictor is enabled, the bitstream conformance check constraining the values of the respective collocated reference picture index syntax elements such that each respective collocated reference picture index syntax element points to the same picture and does not reference the current picture itself.